Hollow, blowing noise

[Northernchimp]

Kind of intermittent, only at moderate speeds over rough surfaces.

Very odd. Just started today. Any ideas?

[Bassfiend229hp]

Was your wife / girlfriend / random lady of your short duration employ with you at the time?

Was it accompanied on your part by a breathless feeling and the need to close your eyes?

[rigga]

Exhaust manifold at the point where the cylinder branches meet might be flexing over bumps and exposing the crack then blowing?

[Northernchimp]

Sounds reasonable. Will get it looked at tomorrow. Good local exhaust builder near my work, fortunatel. Hopefully just a bit of welding required.

[MADMAX2]

Northernchimp said:

Sounds reasonable. Will get it looked at tomorrow. Good local exhaust builder near my work, fortunatel. Hopefully just a bit of welding required.

keep us informed i may have this problem where is this exhaust builder?

[Northernchimp]

St Albans.

They are good and will do work at short notice. Not too familiar with TVRs but they work on mine.

[QBee]

That fix is done by cutting the large tube open as if you had sawed across close to the 4>1 union, welding up the 4>1 union from the inside, and then re-attaching the two halves to each other with a weld. Cost me £100 to get both sides done a few months ago. Common blowing point, and easy to determine where the blow is with a thin piece of rubber tube, one end in your ear, the other end close to the exhaust, and engine running.

[Northernchimp]

Cool, thanks. They should be able to do that in no time.